AutoCodes – Cadillac – U3502 Cadillac

U3502 Cadillac Code - Control Module Supply Circuit 1 High Voltage

Quick Answer

The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. Common causes include Faulty Control Module setting the code, Control Module harness is open or shorted, Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
U3502 Cadillac indicates Control Module Supply Circuit 1 High Voltage.
Common causes
Common causes include Faulty Control Module setting the code, Control Module harness is open or shorted, Control Module circuit poor electrical connection.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 641
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 18, 2020
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Code U3502 Cadillac Description

The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. With the ignition is ON, the Diagnostic Trouble Code (DTC) will set when the control module or sensor detects a system voltage of less than approximately 9 V for approximately 5 s.
OBDII Code U3502 Cadillac - Control Module Supply Circuit 1 High Voltage - AutoCodes.com
U3502 Cadillac Code - Control Module Supply Circuit 1 High Voltage

What are the Possible Causes of the DTC U3502 Cadillac?

  • Faulty Control Module setting the code
  • Control Module harness is open or shorted
  • Control Module circuit poor electrical connection

How to Fix the DTC U3502 Cadillac?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U3502 Cadillac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the U3502 Cadillac code?

Need more information on how to fix the U3502 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U3502 Cadillac code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U3502 Cadillac Code

1. What are the common symptoms of OBDII code U3502 in a Cadillac related to the Control Module Supply Circuit 1 High Voltage issue?

- Common symptoms include illuminated check engine light, poor engine performance, stalling, and rough idling.

2. What could cause the Control Module Supply Circuit 1 High Voltage issue in a Cadillac triggering code U3502?

- Possible causes include a faulty control module, wiring issues, a short circuit, or a problem with the voltage supply.

3. How can I diagnose the Control Module Supply Circuit 1 High Voltage problem in my Cadillac when U3502 is triggered?

- Diagnose the issue by conducting a thorough inspection of the control module, checking the wiring for damage, testing the voltage supply, and using a scan tool to gather more information.

4. Is it safe to continue driving my Cadillac with the U3502 code related to the Control Module Supply Circuit 1 High Voltage issue?

- It is not recommended to drive your vehicle with this code present, as it can lead to further damage and potential safety hazards.

5. Can I reset the U3502 code related to the Control Module Supply Circuit 1 High Voltage problem in my Cadillac by disconnecting the battery?

- Disconnecting the battery may temporarily clear the code, but it is essential to address the underlying issue to prevent the code from reoccurring.

6. Are there any DIY repair tips for fixing the Control Module Supply Circuit 1 High Voltage issue in a Cadillac triggering code U3502?

- DIY repair tips include checking and repairing any damaged wiring, ensuring proper connections, and consulting the vehicle's service manual for specific troubleshooting steps.

7. How much does it typically cost to repair the Control Module Supply Circuit 1 High Voltage problem in a Cadillac with code U3502?

- Repair costs can vary depending on the exact cause of the issue, but it is advisable to consult a professional mechanic for an accurate diagnosis and repair estimate.

8. Can a faulty battery or alternator cause the U3502 code related to the Control Module Supply Circuit 1 High Voltage issue in a Cadillac?

- Yes, a faulty battery or alternator can potentially cause voltage irregularities that trigger the U3502 code, so it is recommended to check these components during diagnosis.

9. Will replacing the control module be the only solution to fix the U3502 code in a Cadillac related to the Control Module Supply Circuit 1 High Voltage issue?

- While replacing the control module may resolve the issue in some cases, it is essential to conduct a comprehensive diagnosis to confirm the exact cause before proceeding with any repairs.

10. Can extreme weather conditions or water damage contribute to the U3502 code related to the Control Module Supply Circuit 1 High Voltage issue in a Cadillac?

- Yes, extreme weather conditions or water damage can potentially affect the electrical components in the vehicle, leading to issues like the Control Module Supply Circuit 1 High Voltage problem and triggering code U3502.

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